Improvements for ABI Compatible Data Types feature request #1997
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C++ forbids zero-sized types, so any type is at least 1 byte in size. This is incompatible with Rust, where empty structs etc. really have a size of 0.
awillenbuecher-xq-tec
requested review from
FScholPer,
antonkri,
johannes-esr and
qor-lb
as code owners
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The created documentation from the pull request is available at: docu-html |
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This PR is stale because it has been open for 30 days with no activity. It will be closed in 10 days if no further activity occurs. #magic___^_^___line |
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@FScholPer @antonkri @johannes-esr @qor-lb Could either of you review and merge this PR? It would be unfortunate if these improvements got lost. |
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| Strings have the same memory layout as ``AbiVec<u8>``, but additionally guarantee that their content is valid UTF-8. |
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I wondering how we're going to guarantee UTF-8 validity
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UTF-8 validity of str is automatically guaranteed in Rust. In C++, custom wrapper types for UTF-8 strings would enforce validity, in the same way as the generated types for tagged unions would enforce valid memory patterns.
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This PR makes some modifications to the ABI Compatible Data Types, as discussed during the Architecture Community F2F Workshop on 2025-11-05. Primarily, these are: